Question

Which from the following compounds does NOT contain phantom atom?

• A. Acetaldehyde
• B. Methyl cyanide
• C. n-propyl alcohol
• D. Propionic acid

Hint:

Phantom atoms are atoms that are part of the structure but do not directly participate in bonding.

Answer 1

The Correct Option is C

Step 1: Understanding phantom atoms.
A phantom atom is an atom that forms part of the structure but is not directly involved in bonding, such as the nitrogen in methyl cyanide (\( \text{CH}_3\text{CN} \)).
Step 2: Analyzing the options.
(A) Acetaldehyde: Acetaldehyde has a carbonyl group, with no phantom atoms.
(B) Methyl cyanide: This contains a phantom atom (the nitrogen).
(C) n-propyl alcohol: This does not contain any phantom atoms, as the structure is fully bonded.
(D) Propionic acid: Propionic acid contains a carboxyl group but no phantom atoms.

Step 3: Conclusion.
The correct answer is (C) n-propyl alcohol, which does not contain any phantom atoms.